Exactly nothing.

The idea of Nostr as a solution for governmental censorship or other forms of authoritarianism is just flawed. Nostr *does* address corporate censorship. That's a more than worthwhile goal on its own: some censors we really should worry about aren't governmental, they are massive companies.

Nostr relays behind darknets might address governmental authoritarianism, but so would be pretty much anything else behind darnkets, and only as long as the government isn't trying too hard to arrest people (you can have all of the theoretical shit you want, but people live in the real world, when they make mistakes and get arrested).

Fighting for democracy and fundamental human rights is a continuous effort and while part of the solution is in software technology (Nostr being a prime example of that), most of it is not. Politics is hard.